Balneotherapy and quality assessment: interobserver reliability of the Maastricht criteria list and the need for blinded quality assessment.

Authors: Verhagen A (1) , de Vet HC (1) , de Bie R (1) , Kessels AG (1) , Boers M (2) , Knipschild PG (1)

Affiliations:

(1) Department of Epidemiology, Maastricht University (2) Department of Medicine, Division of Rheumatology, University Hospital Maastricht

Source: J Clin Epidemiol. 1998 Apr;51(4):335-41

Language: English Countries: Not specified Location: Not specified Correspondence address: Arianne P. Verhagen, Department of Epidemiology, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands

Keywords

Article abstract

This study investigates aspects of the reliability of the Maastricht criteria list for quality assessment in systematic reviews, and whether blinded reviewing is necessary to prevent review bias. We used the data set of 12 articles from a systematic review concerning the efficacy of balneotherapy in patients with arthritis. Twenty reviewers participated of which two reviewers, who have been involved in developing the Maastricht criteria list, acted as reference standard. Half of all assessments were performed blindly. A high level of agreement was found between the reviewers and a high level of correlation with the reference standard. The quality scores between the blinded and unblinded assessment did not differ much. Based on the results we conclude that the Maastricht criteria list is a reliable instrument in quality assessment of clinical trials. Within the limits of this study we found no evidence that blinding is necessary to prevent review bias.

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